A method of manufacturing a surgical instrument that includes an energized feature operable to apply ultrasonic energy or RF energy to tissue. The method includes forming at least one of a microscopic surface pattern or a nanoscopic surface roughness into a base surface of the energized feature to produce at least one recessed portion. The method also includes applying a hydrophobic coating that includes at least one of silicone, titanium nitride, chromium nitride, or titanium aluminum nitride to at least the recessed portion of the energized feature after forming at least one of the microscopic surface pattern or the nanoscopic surface roughness.

A surgical instrument is configured to reduce conductivity between an RF electrosurgical portion and a cutting portion. This reduces improves the efficiency and consistency of the generated RF field, with higher current densities nearest the target tissue, improving the performance of the RF electrosurgical instrument. The conductivity may be reduced using a layer of insulating material, a projecting insulating portion or a cutting portion constructed from an insulating material. Further, by providing a lubricous insulating layer shedding may be reduced, increasing the usable life of the cutting portion.

An electrosurgical instrument end effector includes an active electrode received by an insulating material, the active electrode including a primary suction aperture which provides access to a primary fluid channel extending from the active electrode, through the insulating material, to a lumen. The lumen is arranged to carry fluid to and from a surgical site when in use. The end effector further includes at least one additional fluid channel providing alternative access to the primary fluid channel from the active electrode, wherein the at least one additional fluid channel bypasses the primary suction aperture.

The present disclosure relates to a RF ablation catheter for septal reduction therapy having a cooling effect, and more particularly, to a RF ablation catheter for septal reduction therapy that is for performing RF ablation, in which RF energy is applied to an interventricular septum, for septal reduction therapy such as therapy for hypertrophic cardiomyopathy, which is a disease in which an interventricular septum of the left ventricle of the heart of the animal or human body thickens, therapy that requires reduction of an interventricular septum, or therapy for ventricular tachycardia. Also, the present disclosure relates to a RF ablation catheter for septal reduction therapy having a cooling effect that is for preventing carbonization of a tissue of the body (interventricular septum) around an electrode.

An exemplary embodiment of the present disclosure provides a RF catheter for septal reduction therapy, the RF catheter including: an intra-septal part in which a tapered tip which becomes thinner toward an end thereof is formed at an end of a distal part and one or more electrodes are formed at positions on an outer circumferential surface that are adjacent to the tip; and a body part which is made of a soft material and has a guidewire lumen which passes through the intra-septal part from an inlet formed at the center of the end of the tip and has an outlet formed in a side surface, a coolant inlet lumen which is connected from a proximal part to an inner portion of the intra-septal part to allow a coolant to be injected from the outside and which has an open end, and a coolant outlet lumen which communicates with the coolant inlet lumen and has an exit formed in a side surface, wherein the guidewire lumen and the coolant inlet lumen do not communicate with each other and are partitioned from each other.

In one embodiment, a medical system includes a catheter to be inserted into a body part, and including an elongated deflectable element including a distal end, a proximal coupler connected to the distal end, an expandable assembly comprising flexible polymer circuit strips, each flexible polymer circuit strip including strip electrodes and a respective contact pad disposed thereon, the flexible polymer circuit strips having respective proximal ends connected to, and disposed circumferentially around, the proximal coupler, and surface mountable electrodes electrically connected to respective ones of the flexible polymer circuit strips, wherein each surface mountable electrode is electrically connected to the respective contact pad of a respective one of the flexible polymer circuit strips using at least one electrically conductive retainer.

In one embodiment, a medical system includes a catheter configured to be inserted into a body part of a living subject, and including an elongated deflectable element including a distal end, a proximal coupler connected to the distal end, an expandable assembly comprising a plurality of flexible polymer circuit strips, the flexible polymer circuit strips having respective proximal ends connected to, and disposed circumferentially around, the proximal coupler, respective ones of the flexible polymer circuit strips including respective multiple strip electrodes, respective contact arrays disposed at the respective proximal ends, and respective multiple circuit traces electrically connecting the respective multiple strip electrodes with the respective contact arrays, and a plurality of surface mountable electrodes mounted on, and bulging over respective ones of the flexible polymer circuit strips.

A medical apparatus includes a probe, including an insertion tube configured for insertion into a body cavity of a patient and a basket assembly, which has a proximal end that is connected distally to the insertion tube and includes a plurality of resilient spines, which are configured to bow radially outward around a longitudinal axis of the basket assembly and are conjoined at a distal end of the basket assembly. A plurality of electrodes are configured to contact tissue in the body cavity and include radial electrodes disposed on the spines and an axial electrode disposed on the longitudinal axis of the basket assembly. An electrical signal generator is configured to apply to the electrodes, including the axial electrode, pulses having an amplitude sufficient to cause irreversible electroporation (IRE) in the tissue contacted by the electrodes.

A medical probe, including a flexible insertion tube having proximal and distal ends, and a basket assembly at the distal end of the flexible insertion tube. In embodiments of the present invention, the basket assembly includes a plurality of spines and a plurality of electrodes, each of the electrodes having a lumen therethrough fitting a given spine.

An adjustable, structure providing an ablation apparatus, having a preformed structure made from compliant material such as rubber like material, foam or gel, with particles made of electromagnetic energy absorbing material. An antenna for radiating emitted microwave energy to generate heat and thus cause cavity ablation is located inside of the conformable adjustable structure. When end effector portion is inserted into the body cavity, the compliant adjustable structure is compliant to conform to a profile of the cavity to be ablated, and microwave energy is received to heat the adjustable structure resulting in heat energy that will ablate the cavity tissue in contact with the compliant end effector. Additionally, the shape of the end-effector compliant structure can be differently formed, depending of shape of tissue cavity to be ablated.

An example implantable microparticle for delivering therapeutic heat treatment comprises a generally spherical body. The body may be formed from a first material comprising a biodegradable material and a second material comprising a Curie temperature material. The biodegradable material may be a non-Curie temperature material or have a Curie temperature lower than a Curie temperature of the Curie temperature material. The first material and the second material are mixed to form a composite having a Curie temperature in the range of 35° C. and 100° C.